Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/06/2024, 20:53

General

  • Target

    2024-06-02_54fa73d3ef79147deec7719e65bd6c68_cryptolocker.exe

  • Size

    78KB

  • MD5

    54fa73d3ef79147deec7719e65bd6c68

  • SHA1

    8cf95034a020749d830008b67c70252fb996b971

  • SHA256

    aa688d789f56f72a48dd11ed579d2f43646374b55d901f7e53a27d639083c96c

  • SHA512

    0df4b8580fe37f6dab5b86699aeed5a76e596804989f5b64d13d640daa3c4c42671b1d7c922a5f6498ff882e4d3987213fde96b6de803e292988d9571bb8a188

  • SSDEEP

    1536:vj+jsMQMOtEvwDpj5HwYYTjipvF2hBfIuf1:vCjsIOtEvwDpj5H9YvQd2R

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-02_54fa73d3ef79147deec7719e65bd6c68_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-02_54fa73d3ef79147deec7719e65bd6c68_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4328
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:1680

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\misid.exe

    Filesize

    78KB

    MD5

    2db8ab629dc38b7c5f4307d82a2e5de8

    SHA1

    cff56c75d4e3a6482eb3e4e9c5da299c1683cf08

    SHA256

    c6ef3dafc5b8e227168f01584e60853fe18b0e9220934f3075a71d3e6dfe5965

    SHA512

    629e04146c2144f2653da8214a5e1404c2d4fdd3c29ca2cf5fc31f2f7f446932b008536052d54bd7e239be33f26fdb7bf4161524a088a58125824379a4ba342b

  • C:\Users\Admin\AppData\Local\Temp\misids.exe

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1680-17-0x00000000007E0000-0x00000000007E6000-memory.dmp

    Filesize

    24KB

  • memory/1680-23-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/4328-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4328-1-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4328-8-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB